Electric smelting-furnace.



E. A; A. GRSNWALL, A. R. Lim-BLAD L o. STALHANE.

ELECTRIC SMELTING- E'URNGE.

APPLIOATIGN FILED MAY l, 1906.

im. A29; ww.

'va MEETS-SHEET 1f Patented Mar. 29, 191() 3 SHEETS-SHEET 2.

iirirrnii radianti* onirica.

EUGEN ASSARYALEXIS GRNNALL, 'AXEL RUDOLF LINDBLAD, AND OTTO STLHANE,

. OF LUDVIKA, SWyEDEN.

ELnc'iiiaic sriiiLTIiiG-FURNACE.

To all whom it may concern:

Be it known that. we, EUoiiN Assai: ALEXis GiinwaLL, AXEL RUDoLr LiNDiiLAD, and Ufr'ro S'riLiiANii, engineers, subjects of the King of Sweden, residing at Ludvika, in the Kingdom of Sweden, have invented certain new and useful Improvements in Electric Snielt'ing-Furnaces.

The presentl invention relates to iniprovenients in electric furnaces of the so-called transformer type where .the crucible is formed of an endless groove intended for the reception of the material to be tieated which material alone or together with other conducting materials placed in said. groove forins the secondary coil of an electric transformer. i

The invention consists in a special forni of the said grooveror canal which is intended for the receptionA of the material to be treated and in the combination ofthe said groove with two or several trai'isforiners.

nation of the sinelting groove or canal of the said special forni with a blast furnace or other similar furnaces. l

In the use of electric sinelting furnaces of the above mentioned type and of the consti'uc'tions hitherto known certain dilliculties i have been experienced consisting partly therein that a great difference of phases` Specicaton of Letters Patent.

Application filed May 1, 1906.

takes place which becomes greater, the` greater the arca which is inclosed by the :sind groove fornnng the hearth or crucible and partly therein, that only an electric l line .t1-'Bin Fig. l of such an electric furcurrent of relatively low tension niayV be used in the charge. ent invention these difficulties are ovcrcoine tended for reception of the charge to be heated or sin'elted and which as usual incloses a part of the iron core of the transforiner is partly bent around the said core but provided with one or incre relatively long projections or arins forined in such. a way that certain parts or branches of said groove are arranged substantially parallel to each other and so near each other as is practicable which parts or branches at their outer ends are connected with each other in such a. way that the same together with the parts partially bent around a part of the said core forni an endless groove or canal. By giving the said groove or canal this form, it will have a comparatively greatclosed circuit, but is provided With.one,

According'to the prcsis a plan .view of the saine and partly in i section on the line C-D in Fig. 3 andl Fig. thereby, that the said endless groove ini j Fig, l.

Patented Mar. 29, 1910. serial N01 314,662.

voluine but at the saine time ilncloses a coinparatively small anca wli'ich is a considerable advantage. Anotherfiadvantage is that a greater working tension in the charge may be used than otherwise, which tension will be greater, thelonger the said projection or projections of the sinelting groove. Thus the electric machinery necessary for carrying out the work of the furnace may be considerably cheaper' than with the use of the coi'istructions before. known. An electric sinelting furnace of this construction can also suitably be coin'bined with a blast furnace or another' siinilar furnace in such away that the projecting p'art or parts of the groove of the elect-ric furnace-or in general Words. the parts of the groove arranged substantially parallel to andl near each otheris drawn into vor through the hearth of the furnace. Thus the hearth of the blast furnace will consist of a part of the srnelting groove of the electric furnace, and The invention also consists in the coinbithe material heated or sinelted in the blast furnace will directly drop down into the sinelting bath of the electric furnace and will there be submitted to further treatment by ineans of anelectric current.

On the accompanying drawings there are, as examples, shown sonic forms of construction of the invention. v l

f Figure 1 is a vertical section of a transforiner furnace in accordance with the present invention. Fig. 9. is a plan View of the saine. Fig. 3 is a vertical section on the nace combined with a blast furnace. Fig. 4

5 is a traiisif'erse section on the line Ee-F in Fig. is a vertical section and Fig. T a plan View of another torni of the invention.

In the several figures the saine parts are ndnp'od for me reception o the material to In testimony that We claim the foregoing bo Yvo-dvd and :1 su'xolng; fur :we into which :1s oml own, Wo have hereto aXed our Sgnadw gx-omo portion vxtendg poons of said tures in the presence of twowitnesses. vrouw boing :uxau'i ud. subsauinllypm'ulll Y 311 clon: prox'nhm'v.; said grooves .bng cm'mml ;o im to iiox'm @brawl passages ex- Lwmllj into 1l-'i Smoking furnace Hud pas lm-hq: su'xi'ahlc rusos nt'o the smolting 10 'formica EUGEN AssA-R ALEXIS GRNWALL.

AXEL RUHDOLF LINDBLAD. OTTO STALHANE.

-Wtnesses JOHN ANDERSSON, BERNHARDT RYDT. 

